Homework Help is Here – Start Your Trial Now!
Science
Earth Science
Juring spring, warm Mississippi River water flows into the Gulf. The fresh river water is less dense and floats over the Gulf salt water, as shown by the light blue water layer in the vertical cross-section starting at 2:43 min in the video. The resulting surface water layer convection and the replenishment of dissolved oxygen in ocean water at greater depths & enhances b. prevents c does not change Dissolved gyr

Juring spring, warm Mississippi River water flows into the Gulf. The fresh river water is less dense and floats over the Gulf salt water, as shown by the light blue water layer in the vertical cross-section starting at 2:43 min in the video. The resulting surface water layer convection and the replenishment of dissolved oxygen in ocean water at greater depths & enhances b. prevents c does not change Dissolved gyr

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
See similar textbooks
icon
Related questions
Question
100%
Thank you in advance!!
COS 8-7-SP22 7. During spring, warm Mississippi River water flows into the Gulf. The fresh river water is less dense and floats over the Gulf salt water, as shown by the light blue water layer in the vertical cross-section starting at 2:43 min in the video. The resulting surface water layer convection and the replenishment of dissolved oxygen in ocean water at greater depths. a enhances b. prevents c. does not change Dissolved oxygen is essential for life in the marine food chain. With little to no oxygen, creatures essential to the ecosystem are driven from their habitat. Species that cannot move or escape, die, adding to the decomposition. 8. The nutrients from the Mississippi River system trigger algal blooms in the surface water warmed by the increasingly strong sunlight during spring, which remains intense into summer. The dead algae then sink, settle to the ocean bottom, and decompose. The decomposition process results in the of dissolved oxygen in the deeper ocean water. a increase b. decrease The Gulf of Mexico dead zone typically forms in late spring and early summer, when the consumption of oxygen in bottom water layers cannot be resupplied by the atmosphere, and persists until late summer or early autumn when passing storms (including hurricanes) and cooler temperatures stir and break up the density-layered water structure. Annual research cruises have been conducted for decades to better understand the development of hypoxis zones in the Gulf of Mexico. In summer 2021, the Louisiana Universities Marine Consortium's (LUMCON) research vessel Pelican investigated hypoxia in the northern Gulf of Mexico as part of its 35 annual cruise. The LUMCON group of scientists have monitored the maximum total dead zone area in the Gulf of Mexico since 1985. Figure 5 depicts results from the 2021 cruise showing bottom-water dissolved to eastern Texas (0) concentrations along the Gulf of Mexico coast extending from Louisiana 37 COS-8-SP22 BEA Figure 5. Gulf of Mexico bottom-water bypoxia dissolved oxygen (mg/L.) for 25 JUL to 1 AUG 2021. Black lines enclose values less than 2 mg/L. (LLMCON/NOAA) 1 b. 2 c. 4 9. In Figure 5, heavy black isolines (lines of constant value) have a value of 2 mg/L. Hypoxic waters have dissolved oxygen concentrations of 2 mg/L, or less. The 2021 map reveals major dead zone segment(s) in the sample area In 2021, the total dead zone area measured 16,400 km² (6334 mi.). The 2021 total dead zone was about on par with initial predictions due to the higher average discharge of the Mississippi River providing more fresh water to the northern Gulf of Mexico. It still ranked as the 16 largest dead zone in 35 years of research. You can read more on dead zones and hypoxia, with the 2021 Gulf of Mexico results here: https://www.noaa.gov/news-release larger than average gulf-of-mexico-dead-zone-measured. For comparison, on 24-31 July 2017 scientists measured the total dead zone area at 22,730 km² (8776 mi), as seen in Figure 6. This is the largest ever dead zone measured for the Gulf of Mexico.
Transcribed Image Text:COS 8-7-SP22 7. During spring, warm Mississippi River water flows into the Gulf. The fresh river water is less dense and floats over the Gulf salt water, as shown by the light blue water layer in the vertical cross-section starting at 2:43 min in the video. The resulting surface water layer convection and the replenishment of dissolved oxygen in ocean water at greater depths. a enhances b. prevents c. does not change Dissolved oxygen is essential for life in the marine food chain. With little to no oxygen, creatures essential to the ecosystem are driven from their habitat. Species that cannot move or escape, die, adding to the decomposition. 8. The nutrients from the Mississippi River system trigger algal blooms in the surface water warmed by the increasingly strong sunlight during spring, which remains intense into summer. The dead algae then sink, settle to the ocean bottom, and decompose. The decomposition process results in the of dissolved oxygen in the deeper ocean water. a increase b. decrease The Gulf of Mexico dead zone typically forms in late spring and early summer, when the consumption of oxygen in bottom water layers cannot be resupplied by the atmosphere, and persists until late summer or early autumn when passing storms (including hurricanes) and cooler temperatures stir and break up the density-layered water structure. Annual research cruises have been conducted for decades to better understand the development of hypoxis zones in the Gulf of Mexico. In summer 2021, the Louisiana Universities Marine Consortium's (LUMCON) research vessel Pelican investigated hypoxia in the northern Gulf of Mexico as part of its 35 annual cruise. The LUMCON group of scientists have monitored the maximum total dead zone area in the Gulf of Mexico since 1985. Figure 5 depicts results from the 2021 cruise showing bottom-water dissolved to eastern Texas (0) concentrations along the Gulf of Mexico coast extending from Louisiana 37 COS-8-SP22 BEA Figure 5. Gulf of Mexico bottom-water bypoxia dissolved oxygen (mg/L.) for 25 JUL to 1 AUG 2021. Black lines enclose values less than 2 mg/L. (LLMCON/NOAA) 1 b. 2 c. 4 9. In Figure 5, heavy black isolines (lines of constant value) have a value of 2 mg/L. Hypoxic waters have dissolved oxygen concentrations of 2 mg/L, or less. The 2021 map reveals major dead zone segment(s) in the sample area In 2021, the total dead zone area measured 16,400 km² (6334 mi.). The 2021 total dead zone was about on par with initial predictions due to the higher average discharge of the Mississippi River providing more fresh water to the northern Gulf of Mexico. It still ranked as the 16 largest dead zone in 35 years of research. You can read more on dead zones and hypoxia, with the 2021 Gulf of Mexico results here: https://www.noaa.gov/news-release larger than average gulf-of-mexico-dead-zone-measured. For comparison, on 24-31 July 2017 scientists measured the total dead zone area at 22,730 km² (8776 mi), as seen in Figure 6. This is the largest ever dead zone measured for the Gulf of Mexico.
Figure 3 displays the worldwide distribution of major global dead zones (black dots with size in red). Open the image with this link to zoom in on areas and view the extent of the dead zones The Baltic Sea is the largest dead zone Figure 3. Global dead zones. (NASA) The second largest dead zone worldwide, and the largest in the United States, extends off the coast of Louisiana and Texas in late spring and summer, caused by the large quantities of nutrients from farm fertilizers, soil runoff, and organic wastes carried by the Mississippi River system to the Gulf of Mexico. As large as 8000 mi², this dead zone is recognized for its size and ecosystem casualties Figure 4 displays the drainage system of the Mississippi River, including its tributaries and major distributary (Louisiana's Atchafalaya River is not shown). This river system is the 3 largest in the world, after the Amazon and Congo, and drains 41% of the contiguous U.S. Parts or all of 31 states and 2 Canadian provinces drain into the Mississippi River. Figure 4. The Mississippi River watershed. (US National Park Service) 5. Farmers in parts or all of states and 2 Canadian provinces who fertilize their land to increase crop yield can contribute to a key stressor on marine ecosystems in the Gulf of Mexico. Human activity far inland affects the ocean because they are both part of the same systems 15 View the "The Dead Zone: Nutrient Runoff Creates Hypoxia in the Gulf of Mexico" by NOAA's Environmental Visualization Laboratory at https://www.youtube.com/watch?yaac24 describes the formation of a Gulf of Mexico dead zone. 6. The satellite imagery (at about 2:00 min) shows red (high nutrient) water as it enters the Gulf of Mexico, where they flow. The nutrients then initiate algal blooms. a castward toward Florida b. westward toward Texas northward toward Canada
Transcribed Image Text:Figure 3 displays the worldwide distribution of major global dead zones (black dots with size in red). Open the image with this link to zoom in on areas and view the extent of the dead zones The Baltic Sea is the largest dead zone Figure 3. Global dead zones. (NASA) The second largest dead zone worldwide, and the largest in the United States, extends off the coast of Louisiana and Texas in late spring and summer, caused by the large quantities of nutrients from farm fertilizers, soil runoff, and organic wastes carried by the Mississippi River system to the Gulf of Mexico. As large as 8000 mi², this dead zone is recognized for its size and ecosystem casualties Figure 4 displays the drainage system of the Mississippi River, including its tributaries and major distributary (Louisiana's Atchafalaya River is not shown). This river system is the 3 largest in the world, after the Amazon and Congo, and drains 41% of the contiguous U.S. Parts or all of 31 states and 2 Canadian provinces drain into the Mississippi River. Figure 4. The Mississippi River watershed. (US National Park Service) 5. Farmers in parts or all of states and 2 Canadian provinces who fertilize their land to increase crop yield can contribute to a key stressor on marine ecosystems in the Gulf of Mexico. Human activity far inland affects the ocean because they are both part of the same systems 15 View the "The Dead Zone: Nutrient Runoff Creates Hypoxia in the Gulf of Mexico" by NOAA's Environmental Visualization Laboratory at https://www.youtube.com/watch?yaac24 describes the formation of a Gulf of Mexico dead zone. 6. The satellite imagery (at about 2:00 min) shows red (high nutrient) water as it enters the Gulf of Mexico, where they flow. The nutrients then initiate algal blooms. a castward toward Florida b. westward toward Texas northward toward Canada
Expert Solution
steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Applications and Investigations in Earth Science …
Applications and Investigations in Earth Science …
Earth Science
ISBN:
9780134746241
Author:
Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:
PEARSON
Exercises for Weather & Climate (9th Edition)
Exercises for Weather & Climate (9th Edition)
Earth Science
ISBN:
9780134041360
Author:
Greg Carbone
Publisher:
PEARSON
Environmental Science
Environmental Science
Earth Science
ISBN:
9781260153125
Author:
William P Cunningham Prof., Mary Ann Cunningham Professor
Publisher:
McGraw-Hill Education
Earth Science (15th Edition)
Earth Science (15th Edition)
Earth Science
ISBN:
9780134543536
Author:
Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:
PEARSON
Environmental Science (MindTap Course List)
Environmental Science (MindTap Course List)
Earth Science
ISBN:
9781337569613
Author:
G. Tyler Miller, Scott Spoolman
Publisher:
Cengage Learning
Physical Geology
Physical Geology
Earth Science
ISBN:
9781259916823
Author:
Plummer, Charles C., CARLSON, Diane H., Hammersley, Lisa
Publisher:
Mcgraw-hill Education,
SEE MORE TEXTBOOKS